FizzBuzz kata in Scala using Specs2

build.sbt

name := "Fizz Buzz"

version := "1.0"

scalaVersion := "2.11.1"

libraryDependencies ++= Seq(
    "org.specs2" %% "specs2" % "2.3.12" % "test"
)

scalacOptions in Test ++= Seq("-Yrangepos")

resolvers ++= Seq("snapshots", "releases").map(Resolver.sonatypeRepo)

FizzBuzzSpec2.scala

package com.kata.spec2

import org.specs2._
import matcher.DataTables

object FizzBuzzer {
  class FizzBuzzExtractor[T](f: T => Boolean) {
    def unapply(x: T) = f(x)
  }

  val FizzBuzz = new FizzBuzzExtractor[Int](_ % 15 == 0)
  val Fizz = new FizzBuzzExtractor[Int](_ % 3 == 0)
  val Buzz = new FizzBuzzExtractor[Int](_ % 5 == 0)	

	def eval(value: Int) = value match {
		  case FizzBuzz() => "FizzBuzz"
		  case Fizz()     => "Fizz"
		  case Buzz()     => "Buzz"
		  case _          => value.toString
		} 
}

class FizzBuzzSpec extends Specification with DataTables { def is = s2"""

  the following truth $table gives inputs and expected results for FizzBuzz

                                                                        """

  def table =

     "input" | "result"     |>
      2      !   "2"        |  
      3      !   "Fizz"     |  
      5      !   "Buzz"     | 
      15     !   "FizzBuzz" |  
      33     !   "Fizz"     |  
      55     !   "Buzz"     |
      150    !   "FizzBuzz" |
      151    !   "151"      | { (a, b) => { FizzBuzzer.eval(a) must_== b } }
}

See also my blog post which goes with this gist: http://comp-phil.blogspot.com/2014/06/specs-in-scala-and-c.html